Secondary channel estimation in spatial active noise control systems using a single moving higher order microphone

Huiyuan Sun*, Naoki Murata, Jihui Zhang, Tetsu Magariyachi, Prasanga N. Samarasinghe, Shigetoshi Hayashi, Thushara D. Abhayapala, Tetsunori Itabashi

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    Spatial active noise control (ANC) systems focus on minimizing unwanted acoustic noise over continuous spatial regions by generating anti-noise fields with secondary loudspeakers. Conventionally, error microphones are necessary inside the region to measure the channels from the secondary loudspeakers to the error microphones and record the residual sound field during the noise control. These error microphones highly limit the implementation of spatial ANC systems because of their impractical geometry and obstruction to the users from accessing the region. Recent advances, such as virtual sensing, focus on ANC with microphones placed away from the region. While these techniques relax the usage of error microphones during the noise control, an error microphone array remains necessary during the secondary channel estimation. In this paper, we propose a method to estimate secondary channels without using an error microphone array. Instead, a moving higher order microphone is applied to obtain the secondary channels from the secondary loudspeakers to the region of interest, which includes all desired error microphone locations. By simulation, we show that the proposed method is robust against various measuring errors introduced by the movement of the microphone and is suitable for the secondary channel estimation in spatial ANC systems.

    Original languageEnglish
    Pages (from-to)1922-1931
    Number of pages10
    JournalJournal of the Acoustical Society of America
    Volume151
    Issue number3
    DOIs
    Publication statusPublished - 1 Mar 2022

    Fingerprint

    Dive into the research topics of 'Secondary channel estimation in spatial active noise control systems using a single moving higher order microphone'. Together they form a unique fingerprint.

    Cite this